Timeslip

The Year of the Burn Up (1) (1x13)

Air date: Dec 21, 1970

Simon and Liz exit the time barrier and find themselves back in the Ministry Field in 1970. As the two make their way back home, Simon reluctantly finds himself thanking Liz for returning to find him. Liz says that she didn't. Simon tells her that they must prevent the future they have seen from happening.